[BNX2]: Add an rx drop counter

Add a counter for packets dropped by firmware.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h
index b87925f6..ea1ab06 100644
--- a/drivers/net/bnx2.h
+++ b/drivers/net/bnx2.h
@@ -231,6 +231,7 @@
 	u32 stat_GenStat13;
 	u32 stat_GenStat14;
 	u32 stat_GenStat15;
+	u32 stat_FwRxDrop;
 };
 
 
@@ -3481,6 +3482,8 @@
 
 #define BNX2_COM_SCRATCH				0x00120000
 
+#define BNX2_FW_RX_DROP_COUNT				 0x00120084
+
 
 /*
  *  cp_reg definition